diff --git a/agent_builder/tools.py b/agent_builder/tools.py
index 9dbe8c0..d374014 100644
--- a/agent_builder/tools.py
+++ b/agent_builder/tools.py
@@ -28,7 +28,7 @@ if TYPE_CHECKING:
     from .config import Settings
 
 
-A2A_PACK_MIN_VERSION = "0.1.20"
+A2A_PACK_MIN_VERSION = "0.1.21"
 
 
 @dataclass(frozen=True)
diff --git a/requirements.txt b/requirements.txt
index 76f71e7..76fa1eb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-a2a-pack>=0.1.20
+a2a-pack>=0.1.21
 httpx>=0.27
 boto3>=1.34
 deepagents>=0.5.0